Which statement about a network hub is true?

Which statement about a network hub is true?

• A. All ports share a single collision domain
• B. Each port is its own collision domain
• C. It segments VLANs
• D. It can perform routing

Answer: (A)

A hub does not segment collision domains. It acts as a simple physical repeater, sending any signal it receives out to all other ports. Because every device connected to that hub shares the same shared medium, they all compete for access and can collide if two devices transmit at the same time. That means all ports on the hub belong to one collision domain. By contrast, a switch keeps each port as its own collision domain, so transmissions on one port don’t collide with those on another. VLANs and routing involve more advanced devices (switches with VLAN capabilities or routers), and a hub has none of these features.

A hub does not segment collision domains. It acts as a simple physical repeater, sending any signal it receives out to all other ports. Because every device connected to that hub shares the same shared medium, they all compete for access and can collide if two devices transmit at the same time. That means all ports on the hub belong to one collision domain.

By contrast, a switch keeps each port as its own collision domain, so transmissions on one port don’t collide with those on another. VLANs and routing involve more advanced devices (switches with VLAN capabilities or routers), and a hub has none of these features.